Vacuum cleaner



Aug. 26, 1930. E JUELSON 1,774,062

l VACUUM CLEANER .etto ragej Aug. 26, 1930.` E. JuELsoN VACUUM CLEANER Filed Nov. 9, 1928 v 2 Sheets-Sheet 2 fgllu. 44

Patented Aug. 26, 1930 UNITED STATES EDWIN JUELsoN,- or CHICAGO, ILLINoIs VACUUM CLEANER Application filed November 9, 1928. Serial No. 318,159.

This invention relates to vacuum cleaners and has for its object the provision of a new and improved type of cleaner which shall bc simple to construct, easier to empty and quieter in operation than other machines; the provision of a machine of this character having a new and improved form of dust separator, and a new arrangement of air outlet; the provision of a device which can be made and assembled more cheaply than other machines; the provision of a machine in which the filtering device is less susceptible to clogging, and if clogged is more easily cleansed than other machines; the provision of an electric vacuum cleaner having improved arrangements for cooling the motor; the provision of a cleaner having a new and improved blowing arrangement: While further objects and advantages of the invention will become apparent as the description proceeds.

In the drawings accompanying and forming a part of this application I have shown an illustrative embodiment of my invention. Fig. 1 is a vertica-l sectional view through a complete assembled cleaner embodying my improvements; Fig. 2 is a view similar to Fig. 1 showing the mode of separating the parts for the removal of litter and showing the fils ter cell `in side elevation; Figs. 3 and 4 are horizontal sectional views corresponding to the lines 3-3 and 4.-4 of Fig. 1 respectively; and Fig. 5 is a detail view partly in elevation and partly in section of a portion of the device shown in Fig. 1 illustrating the use of the machine as a blower.

The machine of this invention relates to that type of vacuum cleaner sometimes called the can-type wherein the fan and dust separator are carried in a portable casing from room to room, but remains substantially sta` tionary during the time that the actual cleaning is being effected, the Hoor nozzle being connected to the suction inlet by means of a suitable hose. In the present embodiment the can has cylindrical side walls 1 connected vto a flat, circular bottom 2 provided with suitable pads or casters 3 and also provided' at the center with a perforated area 4 above which is a circular 4socket 5.

Detachably secured to the mouth of this can is a covcr, sealed by a gasket 6, and held in place by any suitable means such forv eX- is the frame 15 of an electric motor whose armature shaft 16 pro-jects into the -fan chamber 17 and is there provided with a suitable fan, preferably comprising blades 18 carried by -a circular plate 19 which is inset in a recess 20 formed in the plate 10. Detachably secured to said plate, (as by screws 24) and surrounding the motor frame at lsome little distance is a cylindrical frame 25 of perforated metal (either sheet metal or screen cloth) having secured to its lower end a bottom plate 27 centrally apertured at 28 and provided around that aperture with a yielding extension 30 adapted to fit in the socket 5. The plate 27 is spaced suflic1ently from the wall 1 to define therewith a litter chamber 31. The extension 30 is preferably of a yielding naturevin order to make a tight lit in the socket 5 without requlring unduly accurate manufacture and location of the cover and in the present embodlment ismade of a piece of rubber pipe. The exterior of the member 25 is covered by a piece of porous cloth, paper, or other fabric 32 which 1s pervious to air but substantially impervious to dust. It can be held in any suitable manner, the simplest mode being by the use of garter springs 33.

The wall of the fan chamber is formed with a discharge opening 35 outside the member 25 and communicating with the chamber 31. The top face of the cover 13 is formed with a cylindrical neck 36 surrounding the inlet opening 14 and serving for the attachment of the collar 37 to which is attached the circunecessary to remove the top plate as shown` the need o tizi lar, cylindrical, transparent, inspection-window 38 generally made of celluloid and riveted thereto. Tightly secured to the upper end of this window is the socketmember 40 of a swivel joint whose companion member comprises a head 42"rotatably secured in this socket and a bent neck 43 leading to the hose receiving nipple 44.

Electric current is led to the motor by means of the flexible conductor45 operatively connected to a switch 46 carried by the cover 13. Also carried by said cover 13 opposite the opening 35 I have shownan upstanding hollow blower neck 47 adapted yto receive either a cap 48 for closing it ora blower hose 49. The suction'hose for the floor nozzle (not shown) is illustrated at 50.

The operation of the fan draws air and litter in through the hose 50, inspection window 38, and inlet 14, and discharges the same into the chamber 31, whence the air passes out by way of the extension 30 ahd discharge outlet'4. This air-fiow serves to keep the motor cool, and allows the use of a smaller and lighter unit than otherwise.y Also the swirling movement of the air as it leaves the fan chamber, causes the greater part of the litter to be separated from the air by centrifugal action with the result that the greater part of the same becomes piled about the outer wall of the can, and the filter fabric is requiredfto perform only a minimum of dust separation. lAccordinglytthe machine showsa minimum of back pressure, and continues to function satisfactorily until the chamber 31 is largely filled with litter.

In order to empty the latter it'is merely in Fig. 2, whereupon thel can constitutes a very convenient pail or container which can 'be carried to a suitable emptying place. To this end Igpi-eferably provide a suitable bail 5l. Owing to the peculiar mode of centrifugal separation the fabric 32 receives a minimum of clogging but when necessary can be easily brushed owing to its smooth support upon the member 25. Also it can readily be removed, for washing,`or replaced, merely by removing the springs 33.

In case a blower be desired it is necessary merely to shift the hose fromthe nipple 44 to the nipple 47. A blast of air suiicient for most purposes can be obtained without closing either of the openings 4 or 35 although a stronger blast can be obtained v by so doing. There is no apparent tendency for litter previously collected in the chamber 31 to return to the fan chamber while using this blower even when the openingf35 is left unobstructed.

The present machine can be `made almost entirely of sheet metal and die castings, with a minimum of sand castings, bufiing, and machine work. The motor frame need not be finished nor made expensively.

It will be understood that many changes in detail can be made, that the parts may vary in shape, thatthe distribution of cast parts and sheet metal can differ from that illustrated, that proportions may be altered, and in general that I donot limit myself in any wise except as specifically recitedin my several claims which I desire may be construed broadly, each independently of limitations Ain other claims.

v ceptacle walls to define a litter-space, a pump carried bV said cover, the outlet from said pump discharging eccentrically into said litter-space so as to cause a swirling of 'the litter around said receptacle, and an outlet from said cell-interior to the open air.

2. In a vacuum cleaner, a hollow receptacle, a cover therefor, a filter cell carried by and depending from said cover, a conduit leading from said cell to a discharge opening in a wall of -said :receptacle other than said cover, and an inlet for air and litter communicating with the space around said cell. i 3. In a vacuum cleaner, a hollow receptacle, a cover therefor having a chamber, a fan in said chamber, a motor carried by said cover and projecting into said receptacle, there bein an annular space for litter between san? motor and the receptacle wall, said receptacle having an air outlet', and a filter screen interposed between the litter space and outlet, said chamber having an opening into said litter-space at one side of said motor.

4. In a vacuum cleaner, a hollow receptacle, 'a cover therefor having a chamber, a. fan insaid chamber, a motor carried by said cover and connected to said fan, and a lter cell carried by said cover and projecting into said'receptacle, the space bet-w en the walls of said cell and receptacle de ning a litter-space and communicating with the outer part of said fan chamber, said fan chamber having an inlet o ening opposite the fan and the interior o said filter cell bein in communication with .the open air.

5. n a vacuum cleaner, a hollow receptacle,- a cover therefor having a chamber, a fan in said chamber, a motor carried by said cover and connected to said fan, a hollow foraminousframe carried by said cover and projecting' into said receptacle, porous iltering fabric carried by said frame and spaced from the wall of the rece tacle to define a litter-space, said fan cham er having an inlet opening and an outlet opening which communicates with said litter-space,

6. In a vacuum cleaner, a hollow receptacle having side and bottom walls, a bail pivoted inside said side walls, a cover for the open end of said receptacle, said cover having a chamber, a fan in said chamber, a motor carried by said cover and connected torsaid fan, said motorrejecting into said receptacle, and there belng an annular litter space around said motor, said fan chamber having an air inlet opposite said fan and an outlet connecting with said litter space, a passageway leading from said litter space to the outer air,'and a lter screen traversing said passageway.

7. In a vacuum cleaner, a hollow receptacle having side and bottom walls and a removable cover, said bottom having an outlet opening and said cover having a chamber, a fan in said chamber, a motor carried by said cover and connected to said fan, a hollow foraminous frame' carried by said cover and projecting into said receptacle and communicating with said outlet opening, and filtering fabric carried by said frame and spaced from the side wall of said receptacle to define a litter space, said fan chamber havingl a discharge opening communicating wit said litter space and also havinlg an inlet opening. i

8. n a vacuum cleaner,A a hollow receptacle` a cover therefor having a chamber, a fan in said chamber, a hollow foraminous frame carried by said cover and projectin into said receptacle, a motor carried by said cover and projecting into said frame, said frame being spaced from said motor to dene an air passagewa and from the receptacle wall to deiine'a 'tter-s ace, and filtering fabric carried by vsaid rame, there being a passageway from said frame interior to the open air andrfromsaid fan chamber to said litter spacer.'`^

ber,.a motor carried pending into said receptacle and operatively 9. In a vacuum cleaner, a hollow receptacle having side` and: bottom walls, a removable cover for said receptacle; a fan casing, a motor and a foraminous frame all carried by said co'ver, said frame surrounding and spaced from said motor and also project-in into said receptaclel and delining with its fan in said chamber operatively connected to the motor, said4 fan casing having an inlet opening opposite to said motor-and an outlet vopening communicatin with said litter-space and one of the wal of said receptacle having an air egress openin communicating with the interior of said oraminous frame.

side walls a lltter-space, and a said receptacle having an outlet openingyand motor projecting into said receptacle,

a filter fabric attached to said frame, an outlet conduit carried by said frame and communicating with the outer air, and a fan in said fan casing operatively connected to said said motor, said fan casing having l an outlet opening into a part of said receptacle and an inlet opening on the side which is opposite said motor.

In testimony whereof I hereunto aiiix my signature.

,EDWIN JUELSON.

10. In a vacuum cleaner, a receptacle hav- I ing a chambered cover, a fan inthe chamby said cover and deconnected to said fan, a ilter fabric inside said receptacle and definin with the side walls thereof a litter-cham r,'one wall of 

